It is not serious RnD, it’s joke-like device, quite practical though.
Device with one major (and primitive) functionality - making specific noises from day to day life.
Why is it cool? Because we do not realise how much common sounds in fact affects our life, and we can tune our usual experience with this additional dimension of sounds.
- Water sounds in a sing in a bathroom. When do some people turn on water in the bathroom? Just to drown out other sounds of hygiene activities.
- Sound of boiling of the kettle in the kitchen. It just made everything cozy.